Home / 136,836.80-188,781.12-79,466.32

Finding the Fourth Proportional to 136,836.80, 188,781.12 and 79,466.32

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Solution

The fourth proportional to 136,836.80, 188,781.12 and 79,466.32 is: 109,632.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,836.80 : 188,781.12 = 79,466.32 : x
  2. Step 2: Convert to fraction form
    136,836.80/188,781.12 = 79,466.32/x
  3. Step 3: Cross multiply
    136,836.80x = 188,781.12 × 79,466.32
  4. Step 4: Simplify right side
    136,836.80x = 15,001,740,891.88
  5. Step 5: Solve for x
    x = 15,001,740,891.88/136,836.80
  6. Step 6: Final answer
    x = 109,632.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.